Scored event in annotation

Thank you for this amazing dataset! There is one thing I am not sure: I am using psg data from Sleep Heart Health Studuy dataset. And there is annotation file with event scored. Are these events scored by the Compumedics Software or by a specialist? Or Are they manual correted? Please help me to make sure this, it is important to me. Thanks!

Thank you for your kind response. Another problem is that there are two kind annotation files: 'annotations-events-nsrr' and 'annotations-events-profusion'. Could you tell me the difference between them?